Praising the Osprey Exos 58, National Geographic Adventure says it clocks in at a remarkable 2.25 pounds yet sacrifices none of the comfort, durability, or carrying features of beefier weekend bags.. Sophisticated in design, the Osprey Exos 58 backpack is for comfort and a super light weight without a sacrifice in ventilation. Use it for multiday to multiweek excursions. Modified Airspeed suspension features an aluminum frame for support and a breathable mesh backpanel with side ventilation for cool comfort. Anchored in the lumbar area, the suspension system provides uniform pressure without annoying hot spots. Features gender-specific BioStretch fixed shoulder harness and hipbelt mesh-covered, slotted foam saves weight and enhances breathability. ErgoPull hipbelt closure relieves hipbone pressure by spreading the tension along both the top and the bottom of the belt, not in a single line along the middle. Innovative Stow-on-the-Go trekking pole attachment allows you to stow and remove poles without removing pack. Top-loading design features a floating lid pocket another pocket under the lid further extends your gear storage options. Features 2 vertical zippered front pockets, a stretch-woven front pocket, side mesh pockets and zippered mesh pockets on hipbelt. Hydration-compatible design with drinking tube portholes reservoir sold separately fits in cavity behind mesh backpanel. Comes with superlight 7mm side compression webbing straps route straps over or under side pockets. 2 thin ice axe tool loops and bungee tie-offs let you strap on ice tools. Use the minimalist cord tie-off points to add a bungee cord for lashing on extra gear. Includes adjustable sternum strap and integrated sleeping pad straps.